Belt-guide.



UNITED STATES PATENT OFFICE.

MOSES EDWIN DE GREE AND DONALD CORMIGK MoALISTER, OF FLAXTON, NORTHDAKOTA.

BELT-GUIDE.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed January 4, 1905. Serial No 239,552.

T0 on whom it may concern:

Be it known that we, MOSES EDWIN DE GREE and DONALD GoRMIoK MGALISTER,citizens of the United States. and residents of Flaxton, in the countyof Ward and State of North Dakota, have invented a new and ImprovedBelt-Guide. of which the following is a full, clear, and exactdescription.

Our invention relates to a guide for belts capable of general use, butespecially applicable to threshing-machines.

The principal objects of the invention are to provide means for guidinga belt to or from a pulley, even when the two pulleys over which thebelt passes are out of alinement, to provide means for preventing thebelt from being thrown from the pulleys under any circumstances, and toguard against any cutting action upon the belt or any unnecessary wearthereof.

Further objects of the invention will appear in the.c0urse of thesubjoined description.

Our invention will be described with especial reference to itsapplication to a threshingmachine, where, as is well understood, underpresent conditions it is necessary to carefully set up the machine anddriving-engine so as to be in perfect alinement. This requires time -andcareful adjustment on the field.

With our invention they can be set up in approximate alinement and, infact, may be from four to eight feet out of the way, and

the belt itself will operate to move the guide Reference is to be had tothe accompanying drawings, forming a part of this specification, inwhich similar characters of reference indicate corresponding parts inall the figures.

Figure 1 is a perspective view showing one form of our invention asapplied to a threshing-machine. Fig. '2 is a sectional view there-' ofon the line 2 2 of Fig. 3, and Fig. 3 is a vertical sectional view onthe line 3 3 of Fig. 2. At the front of the cylinder-pulley is lo cateda stationary frame 11. Upon this frame is mounted a bracket 12. Thisbracket may either be fixedly secured to the frame or adjustable alongit and has a pair of projections 13 extending downwardly upon oppositesides of the frame. These projections are provided with perforations,through which passes astud 14. This stud is provided with one or morenuts 15 upon its inner end to secure it against longitudinal movement inthe bracket, but is capable of turning upon its own axis in theperforations in the projections 13. The stud is provided with a head 16,to which is pivotally attached a movable frame 17. This pivoting actionmay be secured by a vertical rivet 18 or the like. The movable frame 17is provided with bearings 19 and with a bracket 20 for securing a shaft21 in the bearings. Upon this shaft is mounted a guide-pulley 22, havingflanges 23 for keeping the belt on the pulley. A pairv of arms 24project forwardly from the frame 17 above the bearings and are providedupon their inner ends with rollers 25 upon upwardly projectingextensions 26. These rollers are in such position as to engage the edgesof the belt 27, which passes over the pulley 22, when the driver isoffset from the cylinder-pulley 10 in such a manner as to cause the beltto move to one side of the pulley 22.

It will be readily observed that as the belt 27 passes over the pulley22 to the cylinderpulley 10 any offset on the part of the driving-pulley(not shown) will merely result in causing the belt to force theguide-pulley to such a position upon the pivots 14 and 18 as toaccurately, guide it to the pulley 10, the rollers 25 acting to assistin this operation when necessary. It will be seen that the frame'l7 isentirely flexible so far as its motion is concerned with respect to thepulley 10 and that the shaft 21 can be moved by the belt to anynecessary angle with respect to the axis of the cylinder-pulley.

' It will be understood that the operation of the device is accomplishedby the belt itself and that the blowing of the belt by windwill also becompensated for in the same manner, so that there will be no danger ofthe belt being dislodged from the cylinder-pulley under any ordinaryconditions.

While we have illustrated and described one practical embodiment of ourinvention, itis to be understood that the invention is not limited tothe form and details shown, as many changes could be made within the theinvention.

spirit of 5 Having thus described our invention, we

claim as new and desire to secure by Letters a rotatable roller thereon;said rollers being located on opposite sides of the guide-pulley and atthe front thereof.

2. The combination of a pulley mounted on a horizontal axis, with astationary frame mounted in front of the pulley, a bracket upon saidframe provided with projections having perforations, a stud rotatablymounted in said perforations and provided with a head, a frame pivotallymounted in said head, and a guide-pulley rotatably mounted on saidlastmentioned frame.

3. The combination of a pulley mounted to rotate on an axis, with astationary frame adjacent to the pulley, a stud mounted on said frame, asecond frame pivotally mounted with respect to said stud on the side ofthe stationary frame opposite said pulley, and a guidepulley rotatablymounted upon said second frame.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

MOSES EDWIN DE GREE. DONALD CORMIOK MCALISTER.

Witnesses:

J. O. HOVLAND, A. MCALISTER.

